The Ontario Building Code | Exterior Environmental Loads

5.2.1.1. exterior Environmental Loads

(1) Above ground climatic loads shall be determined according to MMAH Supplementary Standard SB-1, "Climatic and Seismic Data".

(2) Except as provided in Sentence (3), below ground exterior environmental loads not described in MMAH Supplementary Standard SB-1, "Climatic and Seismic Data", shall be determined from existing geological and hydrological data or from site tests.

(3) Where local design and construction practice has shown soiltemperature analysis to be unnecessary, soiltemperatures need not be determined.